Figure 4
From: Improved IBD detection using incomplete haplotype information
Example of unsatisfied link. The two heterozygous loci indicated with the arrows are said to be "linked" because they are contained in an IBD segment for which the other sample is homozygous and no other locus in between has the same property and the link is "unsatisfied" because the current phased genotype requires a switch in the IBD pattern.